I am having issues where the fullscreen video with youtube and netflix and usually in flash situations has a tearing/ripping effect. I had this same issue with Ubuntu 13.10. I am trying to figure out a fix, but with the hardware being so new there is little info out there. I do not have this issue with XBMC at all. Its only with video through the browser that I can tell for now.

That looks like video lag, either from the stream or from the GPU. I didn't get that on my rig. Was this from Netflix? It could be a combination of running Netflix and Silverlight through Wine, along with slow streaming from Netflix. I can't remember if you can adjust the stream speed for Netflix through the Wine workaround.

I will try it from a local source to see what happens. This was from Netflix, but the same thing happens with fullscreen Youtube videos as well. I do not have this issue at all with Full screen 1080P Streams from XBMC, so that is what makes me think it is not the hardware or connection.

Could it be the Flash plugin with Mint? The research that I did showed this issue with Ubuntu 13.10 and it was due to the flash plugin, but that was mainly with Nvidia GPU's, so I couldn't find a work around.

Try this: Go to YouTube and select the option to play videos in HTML5. Then go look at some videos in HTML5 and see if you get the same lag (not all videos will be available in HTML5 but it's a good check).

Ok, I just did some quick tests Running LInux Mint 16 from a flash drive, I opened Youtube in Firefox and played the video for Elysium (available in all resolutions up to 4k). I saw the jittering and "slicing" at 720p and 1080p. Then I went to XBMC and installed the Youtube add-on. I opened the same video and saw no "slicing" at all at 720p and only a little of it at 1080p.

Yes, same thing here as well. Anything I watch with the youtube plugin through XBMC plays great, if I play it through the browser in Fullscreen mode and HD it gives the tearing/jittering effect. Thank you for testing it.